Places near centreville and chantilly
I work in the Chantilly area. The place right at Rts. 50 and 28 (on 50) is a buffet type place with lots of Korean, Chinese and Japanese foods, but the quality is surprisingly good and some of the Korean dishes taste like what you get from the good Korean restaurants.
Speaking of good Korean restaurants, Woo Lae Oak is the favorite of the Korean Embassy. It has long been in the Pentagon City area, but about a year or so ago, it opened a nice outpost in Tysons Corner about 15-20 minutes from Chantilly. It's absolutely worth the trip if you're looking for the best in Korean cuisine.
14410 Chantilly Crossing Ln
Chantilly, VA 20151
Its in a strip mall, but its family owned and has very good thai, better than most in dc. Ask for it thai hot, and they will make it very authentic for you.
PHO: There is a new place where the wendy's and the 7-11 is next to the boxing place, near the target. Best pho in the area, the broth actually tastes like they used the right amount of star anise and bones to make the stock. Very good, better than most of the other pho places in the area.